Four-tower nitrogen generator

Four-Tower Nitrogen Generator Product Introduction

Hangzhou Lecheng Gas Equipment Co., Ltd.'s industrial nitrogen generators feature low operating costs, stable nitrogen quality, advanced control systems, and reliable overall machine operation.

Working Principle of the Four-Tower Nitrogen Generator

Industrial nitrogen generators operate on the principle of Pressure Swing Adsorption (PSA). PSA nitrogen generation is an advanced gas separation technology that uses carbon molecular sieve as the adsorbent. Under a certain pressure, it leverages the different diffusion rates of oxygen and nitrogen in the air within the pores of the carbon molecular sieve to separate the air. Specifically, the carbon molecular sieve adsorbs oxygen much more rapidly than nitrogen. A programmable controller manages the opening and closing of multiple valves to achieve alternating cycles between two adsorption tanks, involving pressurization for adsorption and depressurization for desorption. This process separates oxygen and nitrogen, yielding nitrogen of the required purity.

Four-Tower Nitrogen GeneratorProduct Features:
● Reliable overall operation
By combining advanced nitrogen generation process design, scientific gas distribution structure, composite bed structure adsorption towers, unique carbon molecular sieve filling technology, proprietary carbon molecular sieve protection measures, and automatic cylinder compression compensation devices, the normal service life of the nitrogen generator can exceed ten years.
● Stable continuous production
Utilizes imported PLC control systems and pneumatic valves with a switching life of up to 3 million cycles, ensuring high efficiency and reliability; guarantees continuous and reliable operation of the unit.
● Advanced control system
The PLC control system is stable, reliable, and highly automated. Optional touchscreen control system features a user-friendly interface design with multi-screen display functionality, enabling online display of nitrogen purity, flow rate, pressure, fault signals, and other parameters. It allows online modification of operating parameters, includes remote monitoring and transmission signals, and remote start/stop functions. With high automation, simple operation, full automatic control capability, and compatibility with user DCS systems for joint control. The unique online simulated control display screen shows the system process flow and valve status in real-time, offering intuitive convenience and strong reliability.
● Stable nitrogen quality
Adsorption process with adjustable nitrogen purity and pressure, equipped with an automatic interlock venting device, ensures long-term stability in nitrogen output, purity, and pressure.
● Low operating cost
Compared to other methods (including cryogenic nitrogen generation, membrane nitrogen generation, liquid nitrogen, and cylinder nitrogen), PSA nitrogen generation has lower operating costs for small to medium-scale units.
● Comprehensive after-sales service
A complete after-sales service system, rapid response mechanism, and distributed marketing service network ensure every customer can use the product with confidence over the long term.

Working Process of the Four-Tower Nitrogen Generator:

1. Air intake: The air compressor forces air at a certain pressure into the delivery pipeline, which then passes through a compressed air purification system to remove moisture, oil, dust, and other impurities. The air reaches the air buffer tank and is then delivered to two adsorption towers.

2. Adsorption: When air enters the adsorption tower, under pressure, oxygen and carbon dioxide are rapidly adsorbed. Nitrogen becomes enriched near the gas outlet inside the tower.

3. Gas output: When the adsorption process reaches a certain point, the gas output valve opens, delivering finished nitrogen to the nitrogen buffer tank.

4. Pressure equalization: After the exhaust process is completed, there remains a mixture of gas at a certain pressure and purity in the tower, primarily nitrogen. Rather than wasting it, this gas is directly discharged into the other adsorption tower to be mixed with the incoming air for re-adsorption. This process ends when the pressures in the two towers equalize, hence it is called pressure equalization.

5. Exhaust: After pressure equalization, the gases adsorbed by the molecular sieve in the tower need to be released to prepare for the next adsorption cycle. The program automatically opens the exhaust valve, returning the tower pressure to its initial state and venting all adsorbed gases (oxygen, carbon dioxide), allowing the molecular sieve to regain its capacity to adsorb new air.

6. By alternating the operation of the two adsorption towers, a continuous supply of 99.99% purity nitrogen is generated to meet demand.